I suggest installing another version of Firefox (ESR,Beta, Dev, or Nightly), then sign into sync in the browser and see if your logins are there. Make sure to install in a different path than your current install. see screenshot for examples

This way you have another browser with the same data. Kinda of like a back up that I do on all my laptops. see old screenshot

@jonzn4SUSE, thanx for your input! I would rather have one version of firefox that works. I will wait for another solution, but if all else fails, I will try your work around!

Roger that, good luck.

Here is an example of another user with just 1 browser...  ;-) https://support.mozilla.org/en-US/questions/1398385

Did you try to close and restart Firefox or reboot the computer ?

Try to boot the computer in Windows Safe Mode with network support to see if that has effect.

• https://www.bleepingcomputer.com/tuto.../how-to-start-windows-in-safe-mode/
• https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/

You can check the Browser Console for login related messages and possibly temporarily set signon.debug = true on the about:config page to see whether that gives more detail after a restart. Do not forget to reset the pref afterward.

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox